Operation Limits - LG RCAW Operation & Maintenance Manual

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Operation Limits

Temperature
Temperature
Temperature limits during the operation of the unit are as follows.
Maximum ambient temperature: 129.2°F(54°C)
Minimum ambient temperature: 64.4°F(18°C)
Maximum outlet water temperature: 59°F(15°C)
Minimum outlet water temperature: 41°F(5°C)
* Temperature of inlet water must not exceed 68°F(20°C) during continuous operation.
Voltage
Permitted maximum voltage and minimum voltage are displayed on PDB. And if you need other electric data,
please refer to PDB.
When using the 3 phase voltage, never operate the motor of the compressor when the imbalance among the
phases exceed 5%
The formula to calculate the voltage imbalance is as follows.
% Voltage Imbalance = 100 x (Max Voltage from average voltage / Average Voltage)
Max Voltage from average voltage is the absolute value of the maximum gap from the average voltage of the 2
phases.
Example)
Voltage source 400-3phase(1,2,3)-50Hz
12 : 405V / 23 : 394V / 31 : 410V
Average voltage : (405 + 394 + 410) / 3 = 403
Difference between average voltage and each voltage :
Average – 12 = |403 – 405| = 2V
Average – 23 = |403 – 394| = 9V
Average – 31 = |403 – 410| = 7V
Maximum voltage compared to average voltage : 9V
% Voltage imbalance : 100 x (9 / 403) = 2.23%
Because the permitted range of the imbalance the voltage is less than 5%, the device can operate.
34 Chiller Air-cooled Screw